<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>


    <div id="app">
        <span>for 循环</span>
        <ul v-for="item in sortItems">
            <li>{{item}}</li>
        </ul>
        <hr />
        <ul>
            <li v-for="student in sortStudent">
                {{student.name}} - {{student.age}}
            </li>
        </ul>
    </div>

    <script>

        var app = new Vue({
            el: "#app",
            data: {
                items: [82, 65, 33, 46, 57],
                students: [
                    { name: 'jspang', age: 32 },
                    { name: 'Panda', age: 30 },
                    { name: 'PanPaN', age: 21 },
                    { name: 'King', age: 45 }
                ]
            },
            computed: {
                sortItems: function () {
                    return this.items.sort(sortNumber);
                },
                sortStudent: function () {
                    return sortByKey(this.students, 'age');
                }
            }
        });
        function sortNumber(a, b) {
            return a - b;
        }
        //数组对象方法排序:
        function sortByKey(array, key) {
            return array.sort(function (a, b) {
                var x = a[key];
                var y = b[key];
                return ((x < y) ? -1 : ((x > y) ? 1 : 0));
            });
        }
    </script>
</body>

</html>